a typical case study of gratuity

An employee has been taken for employment as retainer with effect from 01.09.2005 to 30.11.2005 which was renewed again 01.12.2005 to 28.02.2006.

His terms of employment was again renewed on 01.03.2006 to 31.08.2006. Now the company gave him an appointment on contract for three years from the period 05.09.5006 to 04.09.2009 which was renewed again on 05.09.2009 for another period of three years of employment.

The employee was getting PF and ESI as per act from the day one of his employment. He left the organisation on September 2010 at the completion of five years of employment.

My querry is whether thius employee will be eligible for gratuity or not.